Selena Gomez's latest onstage tumble just goes to show that live performances can sometimes take a dangerous turn. Almost every big musician has had some sort of physical mishap on stage, be it because of a fan, a faulty piece of equipment, or simply a slippery sole. And it isn't just the stars themselves who can get hurt — sometimes fans and spectators get injured in the process. Click through to see the biggest onstage fumbles, from Beyoncé to Justin Bieber.